With reference to ‘Astrosat’, the astronomical observatory launched by

With reference to ‘Astrosat’, the astronomical observatory launched by India, which of the following statements is/are correct?

  • 1. Other than USA and Russia, India is the only country to have launched a similar observatory into space.
  • 2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth.

Select the correct answer using the code given below.

1 only
2 only
Both 1 and 2
Neither 1 nor 2
This question was previously asked in
UPSC IAS – 2016
Statement 1 is incorrect. While India’s Astrosat is a significant achievement, the claim that *only* USA and Russia, besides India, have launched similar astronomical observatories into space is false. Other space agencies and countries, notably the European Space Agency (ESA) with observatories like XMM-Newton and Integral, and Japan Aerospace Exploration Agency (JAXA) with missions like Suzaku and XRISM, have launched similar astronomical observatories capable of observing in multiple wavelengths (including X-ray, UV, etc.).
Statement 2 is incorrect. Astrosat’s actual mass is approximately 1513 kg (not 2000 kg), and it is placed in a low-Earth orbit at an altitude of about 650 km (not 1650 km).
Since both statements are incorrect, the correct option is D.
Astrosat is India’s first dedicated multi-wavelength space observatory. Other countries/agencies besides USA and Russia have also launched similar observatories. Astrosat’s orbital parameters (mass and altitude) stated in the statement are incorrect.
Astrosat was launched by ISRO in September 2015. It has five instruments studying celestial objects in different wavelength bands: visible, ultraviolet, and X-ray.